{"product_id":"crankshaft-bearings-seal-kit-for-ktm-sx-pro-jr-sr-50-2002-2008","title":"Crankshaft Bearings \u0026 Seal Kit for KTM SX Pro Jr \u0026 Sr 50 2002-2008","description":"\u003ch2\u003eCrankshaft Bearings \u0026amp; Seal Kit for KTM SX Pro Jr \u0026amp; Sr 50\u003c\/h2\u003e\u003cp\u003eThis crankshaft bearings and seal kit is a complete bottom-end rebuild set for the KTM SX Pro Jr and Sr 50 from 2002 to 2008, replacing the crank shaft main bearings and crank seals. The kit gives mini-race mechanics the correct-size bearings and seals needed to restore smooth crankshaft rotation and a leak-free crankcase.\u003c\/p\u003e\u003ch4\u003eOverview\u003c\/h4\u003e\u003cp\u003eThis crankshaft bearings and seal kit is built for the KTM SX Pro Jr and Sr 50 models from 2002 through 2008, supplying fresh main bearings and crank seals for a bottom-end rebuild. The kit suits parents and mechanics maintaining 50cc race bikes who want correct-size components for the crank shaft without ordering bearings and seals separately. Every bearing and seal in this KTM 50 crankshaft kit is sized to the OEM crankcase and crank journal for a drop-in fit.\u003c\/p\u003e\u003ch4\u003eBuilt For Performance\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003eComplete main bearing and crank seal set for the 2002-2008 KTM SX Pro Jr and Sr 50\u003c\/li\u003e\n\u003cli\u003eBearings selected to match the OEM crank journal and crankcase bore sizes\u003c\/li\u003e\n\u003cli\u003eSeals designed to hold crankcase pressure and keep air leaks out of the bottom end\u003c\/li\u003e\n\u003cli\u003eRestores smooth crankshaft rotation for reliable starting and throttle response\u003c\/li\u003e\n\u003cli\u003eDirect replacement components with no machining or modification needed\u003c\/li\u003e\n\u003cli\u003eIdeal for a full bottom-end refresh during rebuild or race prep\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eFits These Machines\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003efor KTM SX Pro Jr 50, 2002-2008\u003c\/li\u003e\n\u003cli\u003efor KTM SX Pro Sr 50, 2002-2008\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eOn-The-Job Use\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003eBottom-end rebuild on 50cc KTM race bikes\u003c\/li\u003e\n\u003cli\u003eFixing crank seal air leaks that cause lean running or hard starting\u003c\/li\u003e\n\u003cli\u003eReplacing worn main bearings during a top-end and bottom-end refresh\u003c\/li\u003e\n\u003cli\u003ePre-season race prep for SX Pro Jr and Sr 50 machines\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eSpecs At A Glance\u003c\/h4\u003e\u003ctable\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003ePart Number(s)\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eKTM 50 Crank Bearings \u0026amp; Seal Kit\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eCompatible Make\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003efor KTM\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eCompatible Models\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eSX Pro Jr 50, SX Pro Sr 50\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eModel Years\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e2002-2008\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eComponent\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eCrankshaft main bearings and crank seals\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\u003ch4\u003eGood To Know\u003c\/h4\u003e\u003cp\u003e\u003cstrong\u003eQ:\u003c\/strong\u003e Does this kit cover both the SX Pro Jr and Sr 50 models? \u003cstrong\u003eA:\u003c\/strong\u003e It is listed for the 2002-2008 KTM SX Pro Jr and Sr 50 machines, which share the same bottom-end layout. Confirm your exact model year and engine before ordering.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eQ:\u003c\/strong\u003e Should bearings and seals always be replaced together? \u003cstrong\u003eA:\u003c\/strong\u003e Replacing crank seals alongside the main bearings is standard practice during any bottom-end teardown. This kit supplies both so the crankcase can be resealed in one pass.\u003c\/p\u003e\u003cp\u003e\u003cem\u003eSlight variation in finish or dimensions may occur between production runs, and fit can depend on serial number, so confirm compatibility before ordering.\u003c\/em\u003e\u003c\/p\u003e","brand":"Solid Spare","offers":[{"title":"Default Title","offer_id":51150171963478,"sku":"OO1C32233","price":168.29,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0697\/8460\/0662\/files\/s-l1600_4e254342-7daa-455e-aee8-34383fc489ae.jpg?v=1794571676","url":"https:\/\/www.solidspare.com\/products\/crankshaft-bearings-seal-kit-for-ktm-sx-pro-jr-sr-50-2002-2008","provider":"Solid Spare","version":"1.0","type":"link"}